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SM79108C40 데이터시트(PDF) 9 Page - SyncMOS Technologies,Inc |
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SM79108C40 데이터시트(HTML) 9 Page - SyncMOS Technologies,Inc |
9 / 25 page Specifications subject to change without notice,contact your sales representatives for the most recent information. 9/26 Ver 2.1 SM79108 08/2006 SyncMOS Technologies International. Inc. SM79108 SPFS[1:0]: These two bits is 2’s power parameter to form a frequency divider for input clock. SPWM Registers - SPWM Data Register (SPWMD0, 0A4H) SPWMD0[4:0]: content of SPWM Data Register. It determines duty cycle of SPWM output waveform. BRM[2:0]: will insert certain narrow pulses among an 8-SPWM-cycle frame Example of SPWM timing diagram: MOV SPWMD0 , #83H ; SPWMD0[4:0]=10h (=16T high, 16T low), BRM0[2:0] = 3 MOV P1CON , #04H ; Enable P1.2 as SPWM output pin SPFS1 SPFS0 Divider SPWM clock, Fosc=20MHz SPWM clock, Fosc=24MHz 0 0 2 10MHz 12MHz 0 1 4 5MHz 6MHz 1 0 8 2.5MHz 3MHz 1 1 16 1.25MHz 1.5MHz bit-7 bit-0 SPWMD04 SPWMD03 SPWMD02 SPWMD01 SPWMD00 BRM02 BRM01 BRM00 Read/Write: R/W R/W R/W R/W R/W R/W R/W R/W Reset value: 0 0 0 0 0 0 0 0 N = BRM[2:0] Number of SPWM cycles inserted in an 8-cycle frame 000 0 001 1 010 2 011 3 100 4 101 5 110 6 111 7 |
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